Contents

Bootloader

The BIOS doesn't seem to support EFI boot on an ArchISO USB stick, even though it detects it as an UEFI bootable medium. Install with a BIOS bootloader unless you know what you're doing. If you are able to boot in UEFI mode, then please add a tutorial.

HDMI

Video

You have to change the video driver.
If the HDMI cable is plugged in on boot it is enabled automatically. If it is plugged in after boot you can use xrandr to enable the second monitor:

# xrandr --output DVI-0 --auto

Audio

You need to know the number of your sound card and the the number of HDMI device:

User specific

Dynamic

The audio device can also be configured with /etc/asound.conf
So you can create a script that links asound.conf to a configuration depending on the hdmi cable plugged in or not: (for some reason my HDMI device is listed as DVI)

If the user is allowed to run the hdmi_switch.sh script and is also allowed to change files in /etc/alsa folder you can bind that script to a key :D
If you also want to change to monitor read this.

Screen Brightness

acpi

Setting brightness in /sys/class/backlight/acpi_video0/ with the scripts for acpid change the values of the files brightness and actual_brightness but do not have any effect on current screen brightness.

The scripts change the screen brightness everytime I run them. Unfortunately the acpi events for brightnessup and brightnessdown are not available anymore although the brightnessup key sets brightness to maximum and the brightnessdown key sets the brightness to max_brightness-1 :( (do not now where this happens) --> this may help

When using the Enlightenment 17 window manager, the brightness keys will work without any additional configuration and the backlight can be adjusted using the built-in backlight widget.